Add body to headers http

Hello
I programming mobile app that need call delete method in api
But i cannot send body to relate method with parameter
Is there header key for add parameter into key and send api ?

what if you do GET query. and send parameter as a GET value? /delete?id=4

what if you do GET query. and send parameter as a GET value? /delete?id=4

I send it but in api it return empty
I use restful library that exist for codeigniter
I report $_SERVER and see it and it exist in arg paramter
But restful cannot get it

what if you do GET query. and send parameter as a GET value? /delete?id=4

I send it but in api it return empty
I use restful library that exist for codeigniter
I report $_SERVER and see it and it exist in arg paramter
But restful cannot get it

It solved Thanks
I get parameter with $_SERVER['argv']